Well, I think for me, it's like that for all porn, f/f, f/m or m/m. Men's bodies don't disgust me, women's bodies don't disgust me; in real life, I can get quite interested in either. But written/drawn/photographed on a page/screen, they do nothing for me; I'm there for the emotion/dialogue/plot, so once the UST, which I do enjoy, morphs into RST, I'm skimming to the next "interesting" bit.